package work.lianwei;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;

/**
 * @author Gong.Yang
 */
public class StrIndexOfTest {
    public static void main(String[] args) {
        System.out.println("123".replace("456", "789"));
    }
}
